How many Sudoku combinations are there?

There are a total of 4,595,805,644,052,864 grid combinations available for the standard Sudoku grid, which has a total of 3-by-3 boxes arranged in a 3-by-3 pattern. Standard Sudoku grids are arranged in a 9-by-9 pattern. The goal is to fill each box up, so that each column, row and 3-by-3 arrangement contains the digits 1 to 9.

The total amount of grid combinations available is calculated based on the permutations of the blocks of columns and rows, and their ability to rotate. Sudoku grids can stray from the standard. In these situations, the amount of grid combinations that are possible will be different.